The only secrets are the secrets that keep themselves.
— George Bernard Shaw
He should creep on by clandestine acts, and not contend in open battle according to the practice of those who excel in courage; he should secretly try many schemes, and thus stealthily extend his empire.
— John Calvin
But not by habits of war nor by open magnanimity, but he shall grow great by fraudulent and clandestine arts; because he was on the one hand most impious, and on the other, of a servile disposition, as we have formerly said.